Queensland Health is urging residents in the south-east to be alert for symptoms of the highly-infectious measles virus as a fourth case of the potentially deadly disease has been confirmed in as many weeks.

The latest confirmed case concerns a 17-year-old female from Caboolture, who has travelled around the Gold Coast, Brisbane and Caboolture recently.

Dr Lambert says Queensland Health have confirmed the young woman went to Grease The Musical and spent time at theme parks on the Gold Coast.

"Measles is a very serious disease. Up to a third of young adults who get measles end up in hospital.

"This is a general warning to everyone - make sure you're up-to-date, make sure your children are up-to-date," Dr Lambert says.

Anyone born in or after 1966 can go to their GP and receive the vaccine for free.

For more information on the measles virus, contact your local GP or call Queensland Health's phone line 13 HEALTH (13 43 25 84).

E. coli

Meanwhile, more than 100 people are facing an anxious wait to see if they have contracted the E. coli infection linked to the animal nursery at last month's Brisbane Ekka.

Thirty-two people, including some children, have so far been infected with a dangerous strain of E. coli.

Five have spent some time in hospital.

Another 103 are suffering symptoms of the bacterial infection, including diarrhoea and abdominal pain.

Dr Lambert says the E. coli outbreak is the largest Queensland Health has seen.

"I expect that we'll have a small number of cases continuing to appear, but as we get further away from the Ekka the likelihood is those numbers will reduce.

"What we're trying to do is identify as many numbers as possible so we can give good advice about hand hygiene in the home."

Norovirus

Dr Lambert says staff dealing with an outbreak of the highly contagious norovirus in south-east Queensland are doing all the right things.

"Outbreaks can and do occur in health care settings," he says. "The infection control staff at all of the locations have identified the cases, isolated them and given advice about hand washing to people coming and going."

The West Moreton Hospital and Health Service has identified 105 patients and staff around Ipswich and Boonah who have contracted the illness, which causes vomiting and diarrhoea.

The largest outbreak is at an Ipswich nursing home, where 55 patients and 14 staff have been affected.

Elsewhere, 11 patients and 11 staff at the Ipswich Hospital have fallen ill, while at the Boonah Health Service one patient and 13 staff are sick.

On the Sunshine Coast, 25 patients in three wards at two hospitals remain quarantined.

Dr Lambert warned that the vomiting bug is a very common virus seen at this time of year.

There is no antiviral medicine for norovirus and symptoms can last for up to three days.